As Yemen faces a humanitarian crisis, the Houthis have been accused of tampering with food and medical aid and misdirecting donations.
Zam, whose hanging has sparked outrage across the world, was the son of a cleric once close to the regime.
Under the direction of their leaders, Houthi-controlled security and intelligence agencies in Yemen have been actively committing abuses.
Despite expected torrential rain and flooding in many parts of Iran, the government did little to prepare and is now blaming lack of funding for its inaction.
Not a single official in Iran has faced justice over the repression of protests that Amnesty International says left at least 304 dead.
'If the war does not end now, we are nearing an irreversible situation and risk losing an entire generation of Yemen's young children,' said Lise Grande, the UN's humanitarian co-ordinator.
The World Food Programme has made 'tremendous efforts' to fight hunger in Yemen, despite encountering obstacles from the Houthis.
The Iranian smart national identity card, now required to obtain benefits and services, appears to be a means of monitoring the public.
More than 24,000 families have been displaced this year amid Houthi attacks on civilians and infrastructure and increasingly dire conditions at IDP camps.
High inflation, unemployment and a harsh winter ahead are all contributing to plunging refugees into more poverty.